It means the opposite, actually.
For example, in your pro football list link, it has Eli as the "sack leader" for 2012. It means that he had the best--meaning the fewest--sacks per pass attempts, considering he had the fewest sacks of any full time starting QB in 2012. Compare that to Aaron Rodgers in 2012, who had only 16 more pass attempts than Eli, but had 32 more sacks (Rodgers=51 sacks vs Eli=19 sacks).
In other words, Rogers led the league with 51 sacks which equates to 9.24%, while Eli had the lowest sack percentage of 3.42%, or 19 sacks.That's why this list you link to has Eli as the "sack leader" for 2012.
So.The list you link to indicates the QB with the best sack-per-pass attempts (ie, fewest sacks) each year leads to the conclusion that, contrary to your claim about Marino being "sacked more than anyone in the league I don't know how many times", he in fact had the fewest sacks per attempts than any QB in his first 7 seasons, and again 5 years later in 94.
Marino had a very good OL for much of his career, as Morehead claims. For most of his career he had a clean uniform at the end of every game.